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A radar receiver has a noise figure of 10 dB at 300 K having a bandwidth of 2.5 MHz. The minimum power it can receive is

3.45 x 10-15 W
1.38 x 10-15 W
7.5 x 10-15 W
93.15 x 10-15 W

Correct Answer: 93.15 x 10-15 W

Explanation:

P_m = kT₀Δ_f(F - 1) = 93.15 x 10^-15 W.

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